8. LenDale White

LenDale White was the thunder in the USC Trojan's "thunder and lightning" rushing attack in 2004 and 2005.

Had fellow running back, Reggie Bush not been on the team during White's time at USC, he probably would rank much higher on this list.

Still, even with Bush taking half of the touches, White was able to rack up over 3,000 yards rushing and add 57 total touchdowns during his career as a Trojan.

After his junior season, White decided to forgo his senior year and enter the NFL draft, a decision that could have prevented him from winning a Heisman himself as well as another national championship.

5. Anthony Davis

Had Anthony Davis played college football at any other school, he would likely be the best running back in school history, but as a USC Trojan, he's only No. 5.

Racking up 3,724 yards and 52 touchdowns over his two-year career as a USC Trojan running back, Davis was one of the most prolific backs of his time, able to score in a multitude of ways.

Davis' most memorable performance was also one of the most impressive single-game performances ever, scoring six touchdowns (four rushing, two on kick returns) in a game against the Notre Dame Fighting Irish in 1972.

Though Davis was an All-American during his time at USC, he was unable to win a Heisman Trophy, finishing second to Archie Griffin in 1974.

1. Marcus Allen

Just as Reggie Bush and LenDale White may have hurt their legacy's by playing alongside each other, Marcus Allen lost two full seasons for the USC Trojans playing behind —and blocking for—teammate Charles White.

Allen's patience all came to fruition his senior season, in which No. 33 put together one of the best rushing performances ever.

On his way to a Heisman Trophy in 1981, Allen ran for 2,427 yards and 22 touchdowns, breaking former teammate Charle's White's single season rushing record by almost 500 yards.

Before Allen made his mark in the NFL, he had totaled 4,810 yards in only two season's as the primary rusher, making him—in my opinion—the best running back in USC Trojan history.